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AN3350 Datasheet(PDF) 93 Page - STMicroelectronics |
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AN3350 Datasheet(HTML) 93 Page - STMicroelectronics |
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93 / 185 page  AN3350 C compiler Doc ID 018512 Rev 2 93/185 12.2.3 Compound literal values When the C99 extensions setting is on, the compiler allows literal values of structures and arrays. Example 28 shows an example. Example 28 Example of a compound literal #pragma c99 on struct my_struct { int i; char c[2]; } my_var; my_var = ((struct my_struct) {x + y, 'a', 0}); 12.2.4 Designated initializers When the C99 extensions setting is on, the compiler allows an extended syntax for specifying which structure or array members to initialize. Example 29 shows an example. Example 29 Example of designated initializers #pragma c99 on struct X { int a,b,c; } x = { .c = 3, .a = 1, 2 }; union U { char a; long b; } u = { .b = 1234567 }; int arr1[6] = { 1,2, [4] = 3,4 }; int arr2[6] = { 1, [1 ... 4] = 3,4 }; /* GCC only, not part of C99. */ 12.2.5 Predefined Symbol __func__ When the C99 extensions setting is on, the compiler offers the __func__ predefined variable. Example 30 shows an example. Example 30 Predefined symbol __func__ void abc(void) { puts(__func__); /* Output: "abc" */ } |
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